Closest Floor element to the curtain Panels

I am trying to find the nearest floor element to the curtain panels in a building. I have tried to find the centroid of the curtain panels and created lines to intersect the floors. I used Geometry.Intersect to find the points of intersection of the Dynamo lines with the floor elements but it returns empty list.

What if you try a larger value than 10. It may be a units issue.